464 MINNESOTA BOTANICAL STUDIES 



Britton, N. L. Manual of the Flora of the Northern States and Canada, 



1st ed. 1901. 

 Britton, N. L., & Brown, A. Illustrated Flora of the Northern States 



and Canada. 2nd ed. 1913. 



In the following list, the statement no specimens indicates that 

 in the collections of the herbarium of the University of Minnesota 

 there are no .'^jjecimens of the species in (juestion, collected in 

 Minnesota. 



The statement reports based on wrong determinations indicates 

 that specimens in the University Herbarium, bearing the label of 

 the species in question prove to belong to other species. 



The nomenclature employed is that used in the seventh edition 

 of Gray's Manual, and the species are listed in the order in which 

 they occur in that work. 



Pteridopiiyta 



Phcgoptcris Rohcrtiana (Hoffm.) A. Br. 



Reported from Minnesota by D. C. Eaton; no specimens. 

 Chcilanthes lanosa (Michx.) Watt. 



Reported in Gray's Manual as occurring in Minnesota; no specimens. 



Cryptogramma acrostichoidcs R. Br. 



Inferred in Upham's Catalogue to occur in Minnesota; no specimens. 



Polystichum acrostichoidcs (Michx.) Schott. 



Reported in Upham's Catalogue; no specimens. 



Polystichum Lonchitis (L.) Roth. 



Reported in Upham's Catalogue and in Lyon's list of the Pteri- 

 dophyta of Minnesota; the latter report is based on an incorrect de- 

 termination of a specimen of Nephrolepis sp. which is labelled from 

 the north shore of Lake Superior; whether this is a case of mixed 

 labels, or the collection of a cultivated plant cannot be determined; 

 no specimens. 



Poh'stichum Braunii (Spenner) Fee. 



"inferred in Upham's Catalogue to occur in ^linnesota; no specimens. 



Aspidium noveboracense (L.) Sw. 



Reported in Britton & Brown's Illustrated Flora; no specimens either 

 from Minnesota or the adjacent states; report probably based on 

 incorrect determination of A. thclyptcris (L.) Sw. 



Aspidium marginale (L.) Sw. 



Reported in Upham's Catalogue; no specimens; it probably does not 



occur. 

 Aspidium Bootii Tuckerm. 



Reported in Upham's Catalogue, and implied in Britton & Brown's 



Illustrated Flora; no specimens. 



